Search
Abnormal ocular movement (e.g. nystagmus) can often be observed in select CNS pathology.
Certain drugs/toxin overdose can also induce nystagmus.
- Anti-epileptics: carbamazepine, lamotrigine, topiramate, phenytoin
- Ethanol
- Ketamine, phencyclidine (PCP), dextromethorphan – vertical or rotary nystagmus
- Serotonergic syndrome/5-HT agonists – opsoclonus
- Monoamine oxidase inhibitors – ping-pong nystagmus
- Lithium
- Scorpion envenomation
In an "unknown" intoxication, physical exam findings such as nystagmus may help narrow the identity of the suspected ingestion/overdose.